1 /* 2 * pm_clock.h - Definitions and headers related to device clocks. 3 * 4 * Copyright (C) 2011 Rafael J. Wysocki <[email protected]>, Renesas Electronics Corp. 5 * 6 * This file is released under the GPLv2. 7 */ 8 9 #ifndef _LINUX_PM_CLOCK_H 10 #define _LINUX_PM_CLOCK_H 11 12 #include <linux/device.h> 13 #include <linux/notifier.h> 14 15 struct pm_clk_notifier_block { 16 struct notifier_block nb; 17 struct dev_pm_domain *pm_domain; 18 char *con_ids[]; 19 }; 20 21 struct clk; 22 23 #ifdef CONFIG_PM 24 extern int pm_clk_runtime_suspend(struct device *dev); 25 extern int pm_clk_runtime_resume(struct device *dev); 26 #define USE_PM_CLK_RUNTIME_OPS \ 27 .runtime_suspend = pm_clk_runtime_suspend, \ 28 .runtime_resume = pm_clk_runtime_resume, 29 #else 30 #define USE_PM_CLK_RUNTIME_OPS 31 #endif 32 33 #ifdef CONFIG_PM_CLK 34 static inline bool pm_clk_no_clocks(struct device *dev) 35 { 36 return dev && dev->power.subsys_data 37 && list_empty(&dev->power.subsys_data->clock_list); 38 } 39 40 extern void pm_clk_init(struct device *dev); 41 extern int pm_clk_create(struct device *dev); 42 extern void pm_clk_destroy(struct device *dev); 43 extern int pm_clk_add(struct device *dev, const char *con_id); 44 extern int pm_clk_add_clk(struct device *dev, struct clk *clk); 45 extern void pm_clk_remove(struct device *dev, const char *con_id); 46 extern int pm_clk_suspend(struct device *dev); 47 extern int pm_clk_resume(struct device *dev); 48 #else 49 static inline bool pm_clk_no_clocks(struct device *dev) 50 { 51 return true; 52 } 53 static inline void pm_clk_init(struct device *dev) 54 { 55 } 56 static inline int pm_clk_create(struct device *dev) 57 { 58 return -EINVAL; 59 } 60 static inline void pm_clk_destroy(struct device *dev) 61 { 62 } 63 static inline int pm_clk_add(struct device *dev, const char *con_id) 64 { 65 return -EINVAL; 66 } 67 68 static inline int pm_clk_add_clk(struct device *dev, struct clk *clk) 69 { 70 return -EINVAL; 71 } 72 static inline void pm_clk_remove(struct device *dev, const char *con_id) 73 { 74 } 75 #define pm_clk_suspend NULL 76 #define pm_clk_resume NULL 77 #endif 78 79 #ifdef CONFIG_HAVE_CLK 80 extern void pm_clk_add_notifier(struct bus_type *bus, 81 struct pm_clk_notifier_block *clknb); 82 #else 83 static inline void pm_clk_add_notifier(struct bus_type *bus, 84 struct pm_clk_notifier_block *clknb) 85 { 86 } 87 #endif 88 89 #endif 90